S B - 7 0 4 M A I N S T A T I O N
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The
main program
input is the one on the XLR connector on the rear panel.
To listen to the main program in the speaker or headphone, adjust the
program
level
control just below the
link
and
all talk
pushbuttons.
Sending and Receiving Call Signals
To send a
call
signal on an intercom channel press the
call
button for that
channel. This is a
momentary
function.
If the
auto-call
option is selected for that channel, activating a
talk
button will
also send a
call
to that channel.
Receiving a
call
signal is indicated by a flashing red
call
button.
Linking Intercom Channels Together
A pushbutton allows the connecting of intercom channels B, C, and D to
channel A. The
link
pushbutton is latching in action. The
link
button
illuminates amber when all channels are linked together. In the latched
position, the entire station operates as one party line.
Talk
and
listen
buttons are non-functional on channels B, C, and D when they
are linked to channel A.
The Announce Function
A single pushbutton sends the active microphone’s audio to the
announce
output on the rear panel. Any active talks are disabled while the announce
button is held. The announce button illuminates amber when held.
Talk
and
listen
latches are not reset, but the microphone’s audio does not go to the
intercom line while the announce function is active. A set of relay contacts
are activated to control some external device.
There is an option which allows program audio to be fed to the
announce
output. If this option is enabled, the announce pushbutton interrupts this audio
when it is pressed. Program audio feed to the announce output is selected by
setting jumper
J11
on the
main
board to the
on
position.
Channel Assignments Using the Slide Switch Matrix
The ten
assignment
switches let you assign the switchboard destinations
(#1 - #10 on the rear panel) to any of the four main intercom channels (
A, B,
C
, or
D
), an isolated off channel, or a separate common party line just for
these inputs.
When the switchboard destinations are assigned to the
off
position, they are
isolated from all other switchboard destinations and isolated from the four
main intercom channels. Stations on one of these lines can only talk to each
other. A call signal on one of these lines will be indicated by the
amber
LED
above the particular matrix switch. Pressing the
all talk
button on the station
will send the microphone to the channel in the
off
position.
When the switchboard destinations are assigned to the party-line position, all
destinations that are placed in the party-line position will be connected into a
common party line isolated from the rest of the station. Pressing the
all talk
Содержание SB-704
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